Mixing valve



June 8, 1937 w. c. BRINKMAN '2,083,360

' MIXING VALVE Filed July 31, 195e 2 sheets-sheet 1 Z13/21Min@ V-Jlun 8, 1937.. w. c. BRINKMAN l 2,083,360

MIXING VALVE Filed July 31. 1956 2: Sheets-Sheet 2 lfatented June 8,1937

17 claims. (cl. zur-1s) This invention relates to certain new and use'- ful improvements in a mixing .valve ladapted lto select desired'proportions of hot and c old liquids from different sources so as to obtain a liquid of any desired temperature, `and then discharge this liquid as desired, through a single nozzle. The valve will ordinarily be used for supplying -water at a desired temperature, but it will be apparent as the description proceeds that it might be used for handling other liquids.

Briey described, the device comprises a suitable valve casing containing separator chambers into which cold water and highly heated water from different sources. of supply are separa ly l delivered, and a mixing chamber. The

mentioned ehambershave separate inlets into the .mixing chamber, and a single rotary mixing valve determines the relative proportionsoi the two liquids that are simultaneously admitted 2' into -the mixing chamber. The mixing chamber'is separated'from the discharge 'nozzle by a cut-oir valve, by means of which the outilow of the mixed ,liquid atA desired temperature isl controlled." A single operating handle, capable 5 of two distinct 'operating movements, is provided for adjusting both of the valves. This handle is mounted on an angularly extending arm. and the handle is rotated about its own axis to open or close the cut-oi! valve, and the handle may he swung bodily, that is revolved about the axis oi the arm, to adjust the posi- -tion of the mixing valve. In other words,.the

handle is rotated to turn on the 4flow of water through the dischargeV nozzle and then the arm object is to provide animproved mix-A v ing-valve adjusting means comprising an-operating handle capable of two distinct movements for effectively controlling the mixing and cut-oit' 50 valves.

vAnother object is to provide an improved ing valve adjusting lmeanscomprising a handle `rotatable about one axis to control the cut-oi valve and bodily revoluble about another axis to 55 control the mixing valve.

rst-

is swung bodily to some selected position to devalve assembly ot water chamber Another object is to provide an improved rotary plate mixing valve and means for adjusting the same.

Another object is 'to'provide an improved mix. l

ing valve having an adjustable nozzle.-

Another object is to provide an improved mixing' valve including means for preventing back now-through .either ,of the supply pipes.

Other objects and advantages of this invention willvbe more apparent from theA following detailed description of 4certain approvedvforms of apparatus constructed and operated accordingto the principles of this invention.

-In the accompanying drawings: Fig. 1 is a central vertical section approved `tor'rn of valve.

Fig. 2is ahorizontal section,

tially on the line 2-2 of Fig. 1.

through one taken lsub-stan- Fig. 3 is avverticai section taken substantially* on theline 3-v-Ioi Fig. 1.'

Fig.'7 is a detail horizontal section taken suby stantially on the line 1-1 of Fig. 5 and looking upwardly, as indicated by the arrows.

Fig. 8 is a diagrammatic .plan view on a smaller scale, illustrating different operative positions o!- the valve adjusting means. p Referring iirst to the form ot .the invention shown in Figs. 1 to 4 inclusive. the valve vcasing comprises a lower casing member I, into the opposite sides ot which are fitted the similar inlet nipple members 2 and I. respectively. The outer end portions of these nipple members are threaded at l and B or otherwise adapted for being joined tothe separate supply pipes for the hot and cold water.- respectively. 'Ihe casing member vl is divided by a central vertical partition or web 0 into a hot water chamber 1 and a cold I, whichchambers communicate at 9 and I0',respectivel y. st the two sides of par# tition I with the interior o! the upwardly pro- ;i'ecting cylindrical Fig. i is a perspective view of mixing-valve '-plate. 4 Y Fig. 5. isa view similar to Fig. 1 showing anthe internal valve A extension H of the casing member. A mixing valve 'in the form of a circular at plate I2 (see also F18. 4) is rotatably ntted'within the upward*extensionV Il between a 'x'edcollar or ring I3 and anupper ring Il and locking ring il' screwed in to the upperendpor- .tion of extension II. This valve plate fits close- `ly upon the top of partition and is'provided with a substantially semi-circular opening or passage I5. 1 As the valve plate I2 is rotated about its 5 central verticalaxis, the passage I5 can be made to communicate selectively with either the hot water. pwage 5 or the cold water passage I5, or partially with both of these passages as may be desired.

The upper valve-casing member4 I5 is formed,

inwardly projecting collar which ilts over the outwardly projecting collar portion II5 `formed'on member I1. An inwardly extending horizontal' web 25 within casing member I5 forms the top of a mixing chamber 2|, which is partially closed at the bottom bythe rotatable valveplate I2.

The central outlet passage 22 in web'25 communicates with the discharge chamber 23 from 25 which extends the discharge nozzle 24. The cut-` off valve 25 mounted on the vertically reciprocable -valvestem 25 is adapted to engage the valveseat 21 formed about outlet passage 22 so as to cut oi the flow of water from mixing chamber` 2| into 'discharge chamber 23 and thence out through nozzle-24. In the present form of the invention,

- thevalve 25 will be lifted to open position by the pressure of the water'within the valve chambers, but is closed downwardly against this pressure to cut oifthe flow of water by the hand-operated means hereinafter described.

It will be apparent that-since the upper casing member is rotatably adjustable upon the'extension II of the lower casing member, the nozzle 2 4 .may be adjusted to'any desirable rotary posivtion about the vertical axis of theA valve stem.

Grdinarily the nozzle 24 will extend at substantial rightangles .tothe -line of the hot and cold water supply pipes 25 and ,25, respectively, (as shown` in Fig, 8) but for convenience of illustration; the nozzle has been shown as turned -into substantially the same vertical plane as these supply pipes in Figs.'1 and 5."

Thefupper casing member I 5 is closed at the top by the A'cap member 55 screwed o n the upper cylindrical extensioni of the casing. .The rotatable operating head 32 has its lower hollow cylindricalv portion projecting downwardly through an opening 33 in cap 35 and is providedwith an outwardly extending collar portion 34 rotatably held between thecap member and al sealing 4ring 35 suspended from the cap member by vscrews or -other suitable means '35.- The upper end portion of valve sternY 25 projects up through sealing ring 55 into the lower portion ofthe rotatable head 32 and is nonrotatably connected with the head by anysuit- 'able keying means, gsuch` as thepin 31, slidably projecting into'the vertical slot 35 inl the interior of thehead. The lower squared or otherwise non-circular portion 55 of the valve stem projects slidably'through a similar's'haped opening `in the upper horizontally projecting portion 45 of an angular' bracket 4I which has its lower 70 angularportionf42 secured to the top of the rotatable valve plate I2. Bracket "extension 42 'may fit into a recess 42 in the upper surface of the valve plateand be secured thereto byscrew 44 or any other suitable 'connecting means.v It will now 75 be seen thata yrotation of head-.52' about the centra] vertical axis of the assembly will cause a similar rotation of valve stem 25, which throughl bracket 4I will also cause-the mixing valve I2 to Vrotate about the same central vertical axis. At the same time, valve stem 25 and cut-off -valve 25 may be shifted vertically .so as to open or close the discharge port 22.

I'he head 52 has a laterally or angularly projecting extension 45 to which is secured the tubular member 45 internally threaded at 41. A Y rotatable operating shaft 45 projects through a bearing 45 in the upper and outer end portions of member 45 and is formed at its inner end with a nut 55 engaging with threads 41 in the laterally projecting arm 45. A handle 5I, which may be in the form of a wheel, knob or cross-bar, is secured to the outer end of rotary shaft j 45. vIt will -now be apparent that as the shaft 45 is rotated about its own central axis, the nut 55 will be moved in or out through the tubular arm 45. A vseries of balls 52, slidable through the hollow 'passage `in head 32 are interposed between the inner end of shaft 45 and the upper end of valve stem 25, so that an inward movement of -shaft-45 will, through this series of balls, cause the valve stem 26 to be pushed downwardly and thus close the cut-oil. valve 25.` It will be-under-- stood that any other suitable form of flexible shaft connection may be used to transmit longitudinal movement from shaft 45 to valve stem 25.

It will now be apparent thatif a person grasps the operating handle 5I, two different valveoperating movements may be imparted to the assembly. First, by rotating the handle about the axis of shaft 45 in a clockwise direction, the cut-off valve 25 can be forced against its seat so as to shut off the flow of ywater through nozzle 24, and hold the valvein this closed position, or if the valve is closed, a rotation of the handle in a counter-clockwise direction will 'withdraw the nut 55 so as to permitthe water pressure to open the cutoff valve and continue the flow of water through the nozzle. Second, by swinging the handle 5I and armv 45 bodily about the central vertical axis of the valve stem 25,`the mixing valve I2 will be simultaneously rotated about the axis so as to proportion the relative amounts of hot and cold water that are admitted to mixing 'chamber2l and then discharged through port 22 and nozzle 24. If the handle and arm are swung to one side positionfas indicated in solid lines in Fig.\8, hotter Water is provided, and if the handle is swungv to the dotted line position, colder water is supplied through the discharge nozzle. In `any position of this operating assembly, the cut-off valve 25 may be opened or closed, by rotating handle 5I, so as to shutoff or turn on the fiowof water as desired. It will be noted that a pair of similar valve seats 55 and 55' are provided at the inner ends of the inlet nipples 2 and 3, respectively, these valveseats being opposed t0 one another at op-4 posite sides of the central partition 5. A pair of similar valve members 54 and 54 are positioned to cooperate respectively with the valve seats 55 and 55', each valve member having two or more guide pins 55 which slide through guide openings in the-partition 5. When the service pressure is onin both inlet pipes the valve members will be moved-:to the inner openpositions shown .in Fig. l 1,. withfthe enlarged heads 55' of the pins vengaging .the respective sides of the partition 5. If the pressure in either supply. pipe-is greatly lowered .(for example when thepipe is disconnected) the higher pressure in the other pipe acting-on'the exposed ends of the pins 55,.which y project through the partition 6 into the higher pressure chamber, will close that valve member against its seat at the outlet of the low pressure --chamber. The attempted back flow of water from the mixing chamber willv act on the rear face of this valve to hold it closed, and will also 10 assist in the closing operation.. Any small difference in pressures in the supplyy pipes will non vclose either valve since the lower pressure acting on the large area of the frontk .valve head will overcome the higher pressure exerted on the l5 relatively small area of the pins 55, and thus the valve will remain in normal open position. Reference will now bemade to Figs. 5, 6 and 'I Ywhich show a modied form of valve assembly. The lower valve casing member I. is divided as before by a central partition 6.', but the upward. cylindrical extension I I is of greater height than the extension Il in the this extension is divided by a central partition member 56 which `forms substantially a vertical 25 extension of the lower partition 6', At the two sides ofthe central partition 56 are hingedly mounted a pair of flap valves 51 and 5B which will normally be forced upwardly (as shownvbyv valve 51) to permit vthe upward iiow` of water from chambers 1' and 8' into the passages 59 and. 60, respectively, at the two sides of the upper partition 5 6.- However, inthe event of an attempted vback flow of-water from the mixing chamber 2l, `one or the other of these valves will be forced down against its respective seat 6I or 62 (as shown by valve 58) so as' to prevent the back flow of -water through the supply pipes. The mixing valve I2 is mounted in the upper end vportion of extension ll' above the partition 56 40 and may be formed and operated substantially as in the first described form of the invention.

In this form of the invention the cut-off valve 25' is mounted as before on the valve stem 26' but is adapted to close upwardly against its valve 45. seat 21', that is, it. closes with the outilow of water instead of against it. A different form of means is shown for raising and lowering the valvel stem 26 and thus closing and opening the cut-off valve. The hollow cylindrical rotatable head 63 is provided at its lower end with an outstanding flange 64 secured by pins 65 to a lower closure plate 66. The flange 64 and plate 66 are rotatably journaled between the inwardly extending flange 61 at the upper end of closure cap 30' and a sealing ring 68 mounted within the cap. An 'internally threaded nut 6 9 is mounted for rotation within the head 63. '10 of valve stem l26. is slidable through openings in sealing ring 66 and closureplate 66 and is formed at its upper end with a nut 1l engaging the internal threads of nut 69. The closure plate 66 is keyed to portion 1li of the valve stem, as indicated at 12, so that the valve stern is forced to rotate with head 63 but is verticallymovable 65 therethrough. The laterally extending operating shaft 48', carrying the operating handle 5I at its outer end, is provided with a bevel gear 13 atits inner end, this gear being journaled in the laterallyextending portion orarm 14 of head 63 in any suitable manner. As here shown, pins 15 mounted in arm 14 project into the annular groove 16 formed in the periphery of gear member 13. Gear 13 meshes with and drives a similar bevel gear 11 formed on the upper end of the internally-v threaded nut 69. Rotation of the operating hanfirst described form and The enlarged upper end portion die 5l will cause rotation of nut 69, thus drawing r up or pushing down the lnnernut 1I, which is prevented from rotation relative to head v63 by the key connection 12. In this manner cut-off valve 25 may b'e moved toward or from its seat 21' by rotation of handle 5|.'., and the cut-olf valve will be positively heldin any selected position. If the handle 5I' is revolved bodily about the vertical axis of the valve stem, the valve stem 26' will be caused to rotate with it through the keyed connection 12 so as to adjust the position of the mixing valve I2. It will be understood that the connectionsbetween valve stem 26. and the mixing 'valve -maylbe the same as in the first described form of the invention. Y

It will be understood that the form of valve for preventing back.flow, shown in Fig. 1, could besubstitutedfor the form'shown in Fig. 5 or vice versa, and also that the form of means for'raising and lowering the cut-olf valve, as lshown in Figfl, could be substituted for the form shown in Fig. 5, or vice. versa.

It will be vnnted that in both of these forms of valve assembly, or.in any. suitable modification thereof,A as covered by the claims whichl follow, both the cut-off vand mixing valves are operated by a single control handle and the as- `sembly is quite compact and of'pleasing appearance. The cut-olf valve can be manipulated `and held in either open.or closed-position in any adjustment of the mixing valve, that is, when the correct temperature of water has been obtained, the mixing valve may be left in this po.

sition and the supply of water through nozzle .24 may be shut oi-or turnedon, asdesired, without disturbing the adjustment of the mixing valve.

1. In combination', a valve casing including a hot water chamber, a cold water chamber anda mixing-chamber, inlet pipe connections to the hot and cold water chambers respectively, a discharge nozzle extending from the casing, a rotary mixing valve between the hot and cold water chambers and the mixing chamber, a recipro-` cable cut-off valve between the mixing chamber and discharge nozzle, a head rotatably mounted on thecasing, an operating arm rotatable with the head and extending laterally therefrom at a fixed angle to the axis of rotation ofthe head, operating connections-for causing swinging movement of the arm about the axis of. rotation of the headto rotate the mixing valve, and means comprlsinga 'handle mounted for rotation about the longitudinal axis of th'e arm for reciprocating the cut-off valve..

.2. In combination, a valve casing including a hot water chamber, a'cold water chamber and `a mixing chamber, inlet pipe connections to the hot and cold water chambers respectively, a discharge nozzle extending from the casing, a rcrocable cut-off valve between the mixing chamber and discharge nozzle, a head rotatably mounted on the casing, an operating arm rotatable with the head and extendinglaterally therefrom,op erating connections for causing swinging movement of the arm about the axis of rotation of the head to rotate the mixing valve, a handle mounted for rotation on the arm, and operating connections in .the arm and headfor causing4 rotary movement-of the handle to produce reclprocable movement of the cut-off valve.

3. In combination. a valve casing including a hot water chamber, a cold water chamber and` a 'mixing chamber, inletl pipe connections to the hot and cold water chambers respectively. a discharge nozzle extending from the casing, a rotary mixing valve between ythe hot and cold water chambers and the mixing chamber, a reciprocable, cut-off valve lbetween the mixing chamber and discharge nozzle, a headl rotatably mounted on vthe casing, a valve-operating stem having one end portion projecting into the head and shift-4 able longitudinally along the axis of rotation of the head, means for keying the stem Ato the head ating arm rotatablewith the head and extending laterally therefrom, so that swinging movement of the arm about the axis of rotation of the head will rotatethemixi'ng valve, .a handle mountedfor rotationon the arm, and-operating connections in the arm and headfor causing rotary movement of the handle to reciprocate the valve-stem.

4. In combination, a valve casing including a hot water chamber, a cold water chamber and a mixing chamber, inlet pipe connections to the hot and cold water chambersirespectively, a discharge nozzle extending from the casing, a rotary nonreciprocable mixing valve between the hotfl'and cold water chambers and the mixing chamber, a reciprocable cut-off valve 'between theixing chamber and discharge nozzle, a head ro tably mounted on the casing, a valve-operating stem `having one end portionv projecting into vthe head -and shiftable longitudinally alongthe axis of -rotation of thehead, means for keying the stem to the head `to rotate therewith, the cut-oi! valve being mounted on thestem to be reciprocated y thereby between open and closed positions, va

member on the mixing valve slidably but non-rotatably connected with the stem whereby rotaryv movement of the stem in any of its longitudinal positions will rotate the mixing valve, an operating arm rotatable with the head and extending Vlaterally therefrom so'that swinging movement of the arm about theaxisof rotation of the head will rotate the mixing valve, and means comprising a handle mounted for rotation on the arm for reciprocating the valve-stem.

5. In combination. a valve casing including a hot water chamberfa cold water chamber and a mixing chamber, inlet pipeconnectionsto the hot and 'cold water chambers respectively, a discharge nozzle extending from the casing, a rotary non-reciprocablefmixing valve between'the hot and coldwaterjchambers and the mixing chamber, a reciprocable cut-off valve between the mixing chamber and discharge nozzle, a head rotatably mounted on the casing', a valveoperating stem having one end portion proiecting into the head andshiftable longitudinally along the axis oi rotation of the head, means for `keying the stem to the headto'rotate therewith, thecut-oi'f valve being mounted on the stem to be ,reciprocated thereby between open and closed positions; a member on the mixing valve slidably but non-rotatably connectednwith yi the stem whereby-rotary movement of the stem in anyof its longitudinal positions will rotate the mixing valve,A an operating arm rotatable with the head and extending laterally there-` from so'that`swlnging movement'of the arm labout the axis of rotation of the head will rotate the mixing valve, and means comprising a handle movable on. the arm for reciprocatingthe valve stem.` I

v 6. In combination, a,valve casing including a 4 hot water chamber, a cold water chamber and a `mixing chamber, inletjpipe connections to the hot and cold .water chambers respectively, adising stem having one end portion projecting into J the head and' shiftable longitudinally'along thev axis of rotation of the head, means for keying the stem to the head to'.rotate therewith, the cut-off valvebeing mounted on thev stem to be reciprocated thereby between open and lclosed positions, a member on the mixing valve slidably vbut non-rotatably connected with vthe stemA whereby rotary movement of the stem inanypf its longitudinal positions will rotate the vmixing valve, andqmeans associated with the` head for selectively rotating the head and'reciprocating the stem to move eitheror both valvesand hold the valves in the lselected positions.

' 7. In vcombinatioma valve casing including a hot water chamber, a cold water chamber and a mixing chamber, inlet pipe connections to the hot and coldwater chambers respectively, a dis-A charge nozzle extending from the casing. a rotary j 'mixing valve between the'hot and coldy water 'chambers and the mixing chambera reciprocable cut-oi! valve between the mixingchame ber and' the discharge nozzle, a head rotatably mounted on the casing, a valve-operating stem having one end portion projecting into. thelhead and shlftable longitudinally alo g the axis of rotation oi' the head. means for k ying the stem to the head to rotate therewith, the cut-off valve beingmounted on the stem to be reciprocated thereby between open and closed positions, a

.member on the mixing valve slidably but nonrotatably connected with the stem whereby rotary movement of the stem will rotate themixing valve, an operating arm rotatable 'with the head and extending laterally therefrom so that swinging movement of the arm about the axis' of rotation of the head will rotate the mixing valve, a shaft rotatably mounted in the armvand projectingin line with the arm from the outer end thereof'and having an operating handle at its outer end. a nut on the innerend of the shaft, a portion of the arm being internally `threaded to engage. the nut whereby-rotation of the shaft will cause longitudinal movement thereof, and a flexible shaft connection mounted vwithin the arm and head and connecting the Ainner end of the shaft with the outer end of the valve stem. v f

8. 'In combination,'a valve casing including a a mixing chamber, inlet pipe connections to the hot water chamber,` a cold water chamber and charge nozzle extending from the casing, la .ro-`

tary mixing valve between the Ahot* and cold wa'- ter chambers vand the mixing chamber, j a re- -ciprocable cut-o tl.' valve between the mixing chamber and the 'discharge nozzle, a head rotatably mounted on the casing, a valve-operat- 74 ing stem having one end portionprojecting into Y the-head and shiftable longitudinally along the axis of rotation of" the head. meansfor keyingthe stem to the head to rotate therewith, the

' positions, a member on the arm from 'the outer endv thereof and having an operating handle at its outerl end, a nut on the inner end of the shaft, a portion of the arm being internally threaded to'engage the nut whereby rotation of the shaft will cause longif tudinal movement thereof, and a plurality Aof balls positioned in longitudinal series within the arm and head and interposed between the inment of the shaft into valve between the vcharge nozzle, a head rotatably mounted on the ner end of theshaft and the outer end of thel valve-stem. f

9.-In combination, a valve casing including a hot Vwater chamber, a cold water chamber and a mixing chamber, inlet pipe connections tothe hot and cold water chambers respectively, a discharge nozzle extending from the casing, a rotary mixing valve between the hot and cold Wa` ter chambers and the mixing chamber, a reciprocable cut-off 'valve between the mixing chamber and the discharge nozzle, a head rotatably mounted on the casing, a valveoperatingstem having one end portion projecting into the head and shiftable longitudinally along the axis of rotation of the head, means for'keying the stem to th`e head to rotate therewith, the cut-oil' valve being mounted on the stem to be reciprocated thereby between open and closed positions, a

member on the mixing valve slidably but nonrotatably connected vwith thev stem whereby rotary movement of the stem will rotate the mixing valve, an operating arm rotatable with the head and extending swinging movement oi the arm about the axis of rotation of the head will rotate the mixing valve, a shaft projecting in line with the arm -from the outer end thereof and having an operating handle at its outer. end, and connections housed within the arm and head for translating rotary movelongitudinal movement of the valve-stem.

l0. In combination, a valve casing including a hot water chamber, a cold water chamber and a mixing chamber, inlet pipe connections to the hot and cold water chambers respectively, a discharge nozzle extending from the casing, a rotary mixing valve between the .hot and cold water chambers and the mixing chamber, a' reciprocable cut-off mixing chamber and the discasing, a valve-operating stem having one end portion projecting into the head and shiftable longitudinally along the axis of rotation of the head, means for keying the stem to the head to rotate therewith, the cut-olf valvevbeing mounted on the stem to be reciprocated thereby between open and closed positions, a member on the mixing valve slidably but non-rotatably connected with the stem whereby rotary movement of the stem will rotate the mixingvalve, an operating arm rotatable wit'n the head and extending laterally therefrom so that swinging movement of the arm about the axis of rotation of the head will rotate the mixing valve, a shaft rotatably laterally therefrom so that4 rotatably mounted in the arm and mounted in the arm and projecting in line with the arm from the oute'rend thereof and havingan operating handle at its outer end, an internally threaded nut mounted'for rotation within'the head, gear connections between the inner end of the shaft and the outer end of the nut, and an externally threaded nut. engaged within the internal nut and mounted on the outer end of the valve-stem so -that rotation of the internally threaded nut will move the valve-stem longimixing chamber,'a mixing valve movable to se-f lectively open or close these outlets to anydesired extent to determine the respective volumes of ow from the hot and cold water chambers into the mixing chamber, means for selectivelyv operating the cut-off and. mixing valves, and one-way valves positioned in each of the passages and opening only toward the mixing chamber.

l2. In combination, a valve-casing including a hot water chamber, a cold .water chamber and a mixing chamber, inlet pipe connections to the hot and cold water chambers respectively, a discharge nozzle extending from the casing,\a cutoff valve between the mixing chamber andthe discharge nozzle, passages extending from the respective hot and cold water chambers and having separate outletsv communicating with the mixing chamber, a mixingv valve movable to selectively open or close these outlets to any desircd extent to determine the respective volumes of ow from the hot and cold water chambers into the mixing chamber, means for selectively operating the cut-off and mixing valves, and ap fvalves pivotally mounted in' each of the passages and automatically opening to permit flow toward the mixing chamber, these valves closing automatically to'prevent return flow from the mixing chamber into either of the other chambers.

13. In combination, a valve-casing including a vhot water chamber, a. cold water chamber and a mixing chamber, inlet pipe connections to the hot and cold Water chambers respectively, a discharge nozzle extending from the casing, a cutoff valve between the mixing chamber and the discharge nozzle, passages extending from the respective hot and cold water chambers and having 'separate outlets communicating .with the mixing chamber, lectively open or close these outlets to vany desired extent to determine the respective volumes of flow from the hot and cold water chambers into the mixing chamber, means for selectively operating the cut-orf and mixing valves, and

a mixing valve movable to sevalve means adapted to prevent back flow from the casing through either of the inlet pipe coni nections.

14. In combination, a valve-casing including a hot water chamber, a cold water chamber and a mixing chamber, inletfpipe connections to the hot and cold water chambers respectively, a discharge nozzle extending from the casing, a cutoi valve between the mixing chamber and the discharge nozzle, aweb in the casing separating the hot and cold water chambers, there being outlet openings from these chambers at the respective sides of the web and communicating with the mixing chamber, a mixing valve movable v to selectively open and close these outlets to any desiredextent to Viieterminethe respective volurnes oi' iiow from the hot and cold water chambers into thev mixing chamber, means'ior selecijivelyoperating the cut-oil' and mixing valves, there beingy valve seats at the outlets of the-inlet pipe connections, these valve seats being op- 10 posed to one another at oppositesides of the web, anda-pair of similar movable valve members each having a valve head positioned in one inlet chamber and adaptedl to engage the adjacent valve seat and asmaller portion projecting through the web intothe other inlet chamber, said members being shiftable by the difference in pressures-existing inthe espective -hot and cold 'water chambers.

15. In combination, a valve-casing including` a ho't water chamber, a cold water chamber and a mixing chamber," inlet pipe connections to the hot and cold water chambers respectively a dischargenomle extending i'roxnv the casing, a cutoi! valve between themixing chamber and the discharge nozzle, a web in the casing separating .the hot and cold water chambers, there being outlet volienings i'romthese chambers at. the re-I spective sides oi' the web and communicating with the mixing chamber, a mixing valve movable to 'selectively open and close these outlets to any desired extent to determine the respective volurnes of ilow from the hot and cold water cham- 4 bers into the mixing chamber, means'i'or selectivelyoperating the cut-oi! and mixing valves, -A

cut-oi! valves positioned respectively'in the hot and cold water chambers'at the outlets ofthe --inlet pipe connections, and members movable 'through the web and operable by al difference in pressures existing between the hot and cold-water 40A chambers' for alternatively. closing the cut-,ot

valve communicating with thechamber under thev lower pressure.'` 16. In combination. a valve casing enclosing a hot water chamber,a cold water chamber and- 45 a mixing chamber, the casing comprising a relatively ilxed lower casing section in whichthe hot and cold water chambers are located, and an upper casing section adjustable about a central vertical axis, a discharge nozzle extending from the upper casing section, a rotary mixing valve positioned in the lower casing section between i the hot and cold water chambers and the mixing chamber and rotatably adjustable v about lthe t vertical axis,`a cut-oi! valve inthe upper casing section between the mixing chamber and the dis- 10 charge nozzle and vertically reciprocable along the vertical axis, a head rotatably mounted on. the upper casing section about the vertical axis,

a laterally extending operating arm mounted to' swing with the` head about the central vertical `151 axis, operating'connections to cause this swinging movement oi.' the armto rotate the mixing valve, and means comprising a handle movable on the arm for reciprocatingthe cut-oiI valve,'the nosixley and upper casing section being rotatably adjust- 20 able about the vertical axis without disturbing .the eifective positioning oi' either-valve.

` 17. In combination, a valve casing enclosing a hot water chamber, a cold water chamber 'and a" mixing chamber, the casing comprising a rela- 25 tivelyiixed lower casing section in which the hot and cold waterchambers are located, and an upper casing section adjustable about a central verticalaxis, a discharge nozzle extending 4 from the upper casing section, a rotary mixing 30 valve positioned in the lower casing section be# tween the hot and cold water chambers and the mixing chamber and rotatably adjustable about the vertical axis,.a cut-oil.' valve in the upper casing section between the mixingchamber and 35 the discharge nomle and vertically reciprocable along the vertical axis, a head rotatably mounted on the upper casing section about the, verticaly axis, and means carried by the head for indie-A pendently and separately adjusting the position v40 of each of the valves, the nozzle and upper casing section being rotatably adjustable about the vertical axis without disturbing the eiiective Aposiv tioning oi either valve. l `WILLIAM C.BRINKMAN. 45 

